Improvement in revolving harrows



@atmi (B it wv/aikk 3:23 a, It? 5 WILL IAM R. TOBY, OF NUNDA, AND MYRON. J. BARCALO, OF

' MOUNT MORRIS, NEW YORK.

Letters'latent No. 84,656, dated December 1, 1868.

The Schedule referred to in these Letters Patentand making part of the same.

To all whom it ma concern:

Our improvement is of that class where the revolving motion is produced by a weight resting on one side and The invention consists in attaching the weighted roller to a slack chain insuch a manner that the roller can be adjusted forward or back, at pleasure, and be. allowed a degree of flexibility or vertical play in passing over rough ground, without becoming displaced.

It also consists in the combination of a draught-rod with the friction-roller and beam, for obviating the great friction at the rear, and producing a more equable draught.

In the accompanying drawings,

A indicates the frame;

B, the beam, which is pivoted at a to the fi'ame and G, the circle-track, for the weighted roller Dto run upon.

The arm b of the roller D is swivel-jointed. at c, (or at a, if preferred,) to the beam, so that the roller can be easily swung over to either side of the barrow, as may be desired, as shown in black and dotted lines.

To the slack chain d (which is secured at its opposite ends to the beam B) is attached at any point, forward or back, the arm I) of the Weighted roller.

The attachment is made by means of any suitable link-connection that is easily disconnected, sothat the roller can be easily adjusted forward or backward, (red lines) to increase or diminish the amountof revolving motion, the slack of the chain allowing such adjust ment- The chain (Z not only allows the adjustment of the roller horizontally, but also allows it a degree of flexibility or vertical play without being thrown over to the opposite side, or becoming displaced. This is of much importance on rough grouu'rhwhere the jar would otherwise throw the roller over;

.At the rear end of the beam B is secured the end of a draught-rod, g, which extends forward on an incline, as shown in fig. 2, with its front end resting in a gauge bearing, h, for adjusting it up or down.

Where the draught is applied directly to the front end of the beam B, the tendency istoprodnce a great amount of friction at its rear, and thereby retard the frecrevolving motion of the barrow.

Bythe employment of this draught-rod the strain upon' the rear friction-'roller'i is entirely obviated, by equalizing the draught on both sides of the centre, in such a-manner as to keepthe beam B evenly balanced, and thereby facilitating the easy working .of the parts;

What we'claim as our invention, and desire to secure by Letters Patent, is-

1.. The combination of the slack chain d with the weighted rollers 1), arm 12, and, beam B, arranged as described,and operating substantiallyas and for the purpose described.

2. The draught-rod g and gauge-bearing h, in combination with the beam B and friction-roller i, arranged andoperating substantially as and for the purpose herein set forth. I I

In witness whereof, we have hereunto signed. our names, in the presence of two subscribing witnesses.

WILLIAM R. TOBY. MYRON J. BAROALO. Witnesses: RIF. O'seQOD,

' ALBERT HAIGHT. 

